package com.zhb.cloud.utils;

import java.sql.Timestamp;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * 日期工具类。
 * 
 * @author dht
 * @version 1.0
 */
public class DateUtil {
    public static final String DEFAULT_DATE_FORMAT_PATTERN="yyyy-MM-dd";
    public static final String DEFAULT_DATE_TIME_FORMAT_PATTERN="yyyy-MM-dd hh:mm:ss";
    private static final DateFormat df=new SimpleDateFormat(DEFAULT_DATE_FORMAT_PATTERN);
    private static final DateFormat dtf=new SimpleDateFormat(DEFAULT_DATE_TIME_FORMAT_PATTERN);
    
    public static Date toDate(String dateStr){
        try {
            return df.parse(dateStr);
        } catch (ParseException ex) {
           ex.printStackTrace();
           return null;
        }
    }
    
    public static Date toDateTime(String dateStr){
        try {
            return dtf.parse(dateStr);
        } catch (ParseException ex) {
           ex.printStackTrace();
           return null;
        }
    }
    
    public static Timestamp toTimestamp(String dateTimeStr){
        try {
            return new Timestamp(dtf.parse(dateTimeStr).getTime());
        } catch (ParseException ex) {
           ex.printStackTrace();
           return null;
        }
    }
    
    public static String formatDate(Date date){
        try {
            return df.format(date);
        } catch (Exception ex) {
           ex.printStackTrace();
           return null;
        }
    }
    
    public static String formatDateTime(Date date){
        try {
            return dtf.format(date);
        } catch (Exception ex) {
           ex.printStackTrace();
           return null;
        }
    }
    
    
    
}
